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प्रश्न
State the energy change that takes’place in a D. C. motor.
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उत्तर
The energy change that takes place in a D. C. motor is from electrical energy into mechanical energy.
संबंधित प्रश्न
Show with the aid of a diagram how a wire is wound on a U-shaped piece of soft iron in order to make it an electromagnet. Complete the circuit diagram and label the poles of the electromagnet.
What is an electromagnet?
State three uses of an electromagnet?
Name the type of transformer shown in fig . What changes will you observe regarding the brightness of the lamp, if
(a) The no. of turns in the secondary is doubled?
(b) The part X of the transformer is removed?
( c) The core of the transformer is made out of copper?
(d ) The A.C. supply is replaced by D.C.?
Answer the following in short.
Name a few common appliances that use electromagnets.
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What energy conversion takes place during the working of a d c motor?
State the position of armature coil relative to the direction of magnetic field, in a D. C. motor when the deflecting couple acting and the coil is minimum.
